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L A. J. B. A. GHATAIN.

' *fLooRnKIGIk No. 283,375. Patented Aug. 21, 1883.Y

far/Messes: In ndlr/h' UNITED f S'rnfrns ArtNr Fries.

- AMAND J B. A. OHATAIN, OF NhT YORK, Y.

FLovo'RlNe".

SPECIFICATION forming part of Letters vPatent No. 283,375, dated August21, 1883,

Y Application tied April er, icas. (No modem.

To o/Z whom it'my concern.-

Be it` known that I, AMAND J. B. A. OHA- TAIN, of New York, in thecounty of New York and State of New York, have invented a certain newand useful Improvement in Flooring, of which the following is aspecification.

This improvement relates to ooring which is composed of slabs o1 stone,wood, or other material, but more particularly to flooring which iscomposed of wooden sla-bs of mosaicwork.

The object or the improvement is to provide a more effective means forsecuring such slabs together and for maintaining them in their properrelative positions. A

In the accompanying dra-wings, Figure ll is a top view of a number ofslabs and means embodying my improvement for securing them together,certain parts of the slabs being removed or broken away the better toillustrate the means whereby they are secured together; and Fig. 2 is avertical section of such slabs anda sectional view of the means wherebythey are .secured together.

Similar letters of reference designate corresponding parts in bothfigures.

A B C D designate four slabs of stone, wooden mosaic-work, or othermaterial.

E F designate bolts wherebythe slabs are secu red together. Each of thebolts E consists of a shank, a, externally screw-threaded at the end,and a head, b, provided at the end with an internally-screw-threadedsocket. The socket in the head of each of these-bolts is of such a sizeand its screw-thread of such a pitch that its shank may engage with thehead of an adjacent bolt E and 4its head may engage with the shank o'i'.an adjacent bolt E arranged in line with it. ln the end of the head oi'each bolt E is a notch, c', capable of receiving a screw-driver. Theslabs A B have cavities d,

suitable for receiving the shanks of the bolts c v E, and cavities e,suitable for receiving the heads of these bolts. These blocks have theirbolts E inserted in them, and dowels or dowelpins I iitted in oppositecavities, j', one on each side of the bolts, and by means of ascrewdriver inserted in the bolt E of the slab B said bolt is screwedinto the boltE of the slab A. These slabs are thus firmly securedtcgethcr, and the dowels prevent them from twisting or warpingrelatively to each other. Assuming the block A is a block at `theedge-of the ilooring, it will have a screwthreaded socket, J, applied toits edge to receive the shank of the bolt E of that block.

The slabs C D are secured together in the same 'these slots and enablesthe bolt to be turned,

while the slots are concealed from view, into such position as-to bringone of the slots parallel with the top and ybottom of the slab intowhich the bolt is fitted. One of the slots must occupy such position.The slab A is secured to the slab C- and the slab B to the slab D by thebolts F. These bolts F are preciselyy like the bolts E, except thattheir heads are very much shorter-so short, indeed, that they do notextend to the middle portion of the slabs in which these bolts iit.These bolts are inserted into the slabs, which they unite, and screwedtogether in the saine manner as the bolts E. Their shanks pass throughthe slots g of the bolts E, and dowels or dowel-pins I are fitted intocavities f to prevent the twisting or warping of the slabs. If the slabsC D are lend slabs, they will have applied to their outer edgesscrew-threaded sockets to receive the ends of the Shanks oi the bolts F.Slabs thus united will be secured together, so that they will not warpor shrink to any material extent independently of each other. If anyshrinkage should occur, it can be readily compensated for by tighteningthe bolts. XV here the slabs are made of wood the bolts should bescrewed up so tightly as to slightly compress the fiber of the wood, forthen considerable shrinkage can occur without marring the appearance ofthe flooring.

The bolts E F ma,T be made of malleable iron or other appropriatematerial. By intersecting and engaging together, the two series IOO ofbolts effeetually prevent the warping or setting of the slabs so as tobreak joints.

Vhat I claim as my invention, and desire to secure by Letters Patent,is-

1. Theeombination, with a number of slabs, of a bolt passing througheach slab, and provided with a head fitting in a cavity in its slab, anda shank iitting in the head of a bolt in an adjacent slab, the saidbolts being thus engaged with one another, substantially as specified.

2. The combination, witha number of slabs, of two series of lboltsextending through the slabs and engaging with one another, substantiallyas specified. l

AMAND J. B. A. oI-IATAIN.

Witnesses:

T. J. KEANE,

En L. MORAN.

